anaesthsesia 2 - machines

Question 0

how would resistance affect choice of the system?

Answer 0

hypoventilation

all valves, canisters, and hoses resistance increases more with diameter than length. IPPV normally overcomes with this.

Question 1

explain some factors influencing the system you would choose?

Answer 1

• resistance
• meachanical dead space
• circuit drag
• ease of maintenance/sterilisation
• valve position
• ease of scavenging

Question 2

mechanical dead space, how would this affect choice?

Answer 2

vdmech. expired gas which is re-aspirated unchanged every breath. reduces portion of fresh gas reaching alveoli. - hypoventilate

Question 3

what is circuit drag?

Answer 3

increase with parallel lack due to 2 tubes
heavy hoses valves and canisters
facilitate extubation

Question 4

if an animal has an infectious disease then the system must be?

Answer 4

easy to clean/sterilise or disposable.

Question 5

explain how valve position may have an affect?

Answer 5

if too close to head eg. magill. then problem in dental surgery.

Question 6

explain ease of scavenging?

Answer 6

if near pressure relief valve - contributes to the drag.

Question 7

SEE ALL THE SYSTEMS IN BOOKLET!!! which are bag on expiratory limb?

Answer 7

ayres and the bain. learn pros and cons of all!!!